Electric-lamp-socket shell.



ILE. ELECTHIC LAMP SOCKET SHELL.

APPLICATION FILED FEB. 19. 19H. 1,241,851. Patented 0m 2,1917.

ILE, or cggpoiv'ro, onrenio, CANADA, M

a .To all whom it may concern: Be it'known' that I, WILLIAM ILE, a subject of the King of Great Britain, and resi dent of the city of Toronto, county of York,

G Province of Ontario, in the Dominion of Oanada,;have invented certain new and use- I ful Improvements in ElectricLamp-Socket Shells, described in the following specification and illustrated in the accompanying drawings, that form art of the same.

w The objects of thelnvention are, to eliminat e the'dangersof short circuits in electric lamps due'to the accidental loosening of the socket shell and to provide a shell in which the body portion may be securely locked to the cap .and whichmaybe easily and quickly released and removed. The y principal. feature of tl1e-1IlV8Ilt1011 consists in the novel construction of the.

shell whereby laterally arranged tongues are formed on one of the shell members and are adapted to interlock with projections formed on the other member, and whereby the body of. the shell isslit to engage a projecting portion of the cap to lock the members.

In the drawings, Figure 1 is a perspective view of a shell constructed in accordance with this invention showing the cap removed from the body portion. p Fig.2 is an enlall-lgled perspective detail partly broken away ustratmgthe cooperative 'interlockin features.

Fig. 3 is an e arged perspective detail of aportion of the cap and body showing the tongue member entering the recess formed by one of the loops.

Fig. 4 is an enlarged vertical sectional view through the interlocking members.

Lamp socket shells of numerous k1nds have been manufactured in which one of the members is. provided with .protuberances which are adapted to enter. corresponding holes or recesses in the other member and,

these are sprung into place but such constructions are jound to .be very unreliable particularly when the members havebeen disconnected a few times with the result that the body portion of the shell pulls away fromthe cap short circuitmg of the w1r1n which is both dangerous an 7 The construction described-in the present ap lication has been devised with a view to de nitelylockin the. shell and cap together 56 and to this end t e shell lis formed with the or terminals nLEcTnIo-LAmr-soomr SHELL; j

Specification of Letters Patent.

and' frequently results in the inconvenient.

Patented Oct. 2, 1917.1

.Applieation filed February 19, 1917. Serial No. 149,459. r

. notches 2 in the upper These notches 6. The loops are preferably.formeclby in denting the metal of the rim ofthe cap;'a1 id the metal-is sheared and stretched-inwardly a sufficient distance to provide openings. 7; through which the tonguemembers .3 may pass. v The notches 2 in the shell. are ,spacedequir; distant as are the loops 5 in the capqand these are arranged to coincide, The. cap here shown is provided-,with fouril oops and I the shell with three notches to. registerwith the loops and in place Ofafonrth; notch the shell is formed. with. a longitudinalslit. 8, which maybe sufficientlywide-to.receive'the shank of the key of the socket or in keyless sockets the slit is only slightly wider than the width of the loops 5.

The edge of the slit 8 is so arranged in relation to the notches 2 that when the cap 1s placed upon the top of the body portion so that several loops are in alinement with the space between the ends of the tongues and the sides of the notches, one of the loops will engage the outer face of the shell close to the slit and as the cap is forced into posit1on the metal of the shell springs inwardly. When the cap has been pushed to its downward limit upon the shell it is then r'o-' tated thereby causmgthe tongues 3 to pass through the openings 7 and across the loops 5, the ends of the tongues passin completely across the loops and inter ocklng with the metal at each side thereof. As the cap is thus turned the loop. adjacent to the slit 8 drops into the slit as the loops are 'brought into contact with the sides of the 'Q' v p v p 1,2441

any conditions that would arise in such devices.

When it is desired to separate the body of the shell from the cap it is merely necessary to spring the metal inwardly from looking engagement with the loop at the slit and the cap may then be turned quite freely and when turned back until the loops engage the side walls at of the notches the cap will structed release;

The device as herein shown and described in detail shows the tongue members passing through a loop but it must be understood that the tongue may engage an inward projection other than of loop form.

What I claim as my invention is 1. An electric lamp socket shell, comprising, a separable body and cap, one of said members having laterally arranged tongues and the other having loops adapted to receive and interlock with said tongues, the member having the tongues being slotted inwardly from the edge to receive one of with the remaining loops.

2. An electric lamp socket shell, comprising cap having inwardly projecting loops formed in the flange and spaced equidistant, and a body formed with a plurality of notches in the upper edge, certain of said notches being spaced to correspond withthe loops on the cap and having laterally arranged tongues adapted to extend through said loops upon a partial rotation of the cap, and other of said notches being spaced to receive a corresponding loop upon the rotation of the cap and arrangedtoen age, the edges of the loop to hold the cap rom rotation;

3. An electric lamp so'cketshell, comprising, a body formed with a plurality of notches in the upper edge and laterally arranged tongues at one side of saidfnotches.

said body also having a longitudinal slit said loops on the interlocking of the tongues in the upper edge, and a cap having indentations formed in the rim and forming loops to engage said tongues; one of said loops fitting into said slit when the tongues are arranged in engagement with the loops to lock said tongues and loops together.

WILLIAM ILE. 

